1020120099 has 16 divisors (see below), whose sum is σ = 1375762944. Its totient is φ = 672300000.

The previous prime is 1020120083. The next prime is 1020120103. The reversal of 1020120099 is 9900210201.

It is not a de Polignac number, because 1020120099 - 2⁴ = 1020120083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020120499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 225312 + ... + 229794.

It is an arithmetic number, because the mean of its divisors is an integer number (85985184).

Almost surely, 2^1020120099 is an apocalyptic number.

1020120099 is a deficient number, since it is larger than the sum of its proper divisors (355642845).

1020120099 is a wasteful number, since it uses less digits than its factorization.

1020120099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1020120099 is about 31939.3190127780. The cubic root of 1020120099 is about 1006.6622159772.

The spelling of 1020120099 in words is "one billion, twenty million, one hundred twenty thousand, ninety-nine".